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  • 1
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    Shuttle applications in tropospheric air quality observations (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The role which might be played by the space shuttle in obtaining data which describes the air quality of the north-eastern United States was investigated. The data requirements of users, a model for statistical interpretation of the observations, the influence of orbit parameters on the spatial and temporal sampling and an example of application of the the model were considered.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-CR-145374
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    The inclusion problem for monadic recursion schemes (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The inclusion problem for the class of monadic recursion schemes is shown to be undecidable. The proof illustrates the close relationship between monadic recursion schemes and deterministic pushdown automata. The proof is extended to show that both the weak equivalence problem for the class of monadic recursion schemes and the weak equivalence problem for the class of free schemes without identity are undecidable.
    Keywords: MATHEMATICS
    Type: NASA-CR-131292 , REPT-2-73
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Evaluation of satellites and remote sensors for atmospheric pollution measurements (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An approach to the development of a prioritized list of scientific goals in atmospheric research is provided. The results of the analysis are used to estimate the contribution of various spacecraft/remote sensor combinations for each of several important constituents of the stratosphere. The evaluation of the combinations includes both single-instrument and multiple-instrument payloads. Attention was turned to the physical and chemical features of the atmosphere as well as the performance capability of a number of atmospheric remote sensors. In addition, various orbit considerations were reviewed along with detailed information on stratospheric aerosols and the impact of spacecraft environment on the operation of the sensors.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-CR-144970 , MTR-7170
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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